344 中性子照射などにより延性が著しく低下する場合の構造健全性確保の概念(OS10-3 照射劣化,溶接部評価,OS10 エネルギー機器の経年変化に関する健全性評価手法の開発とその適用(2))

概要

論文の詳細を見る
A new, systematic concept of structural integrity assurance is proposed for application to components with reducing or reduced ductility materials. The current structural codes are all based on the assumption of no significant changes in mechanical property in service and high ductility. Intense neutron irradiation at moderate temperatures in nuclear reactors and fusion machines, for example, induces hardening, e.g., a significant change in yield strength, and then reduction in ductility. Therefore, failure modes to be prevented are discussed, first, for components with such materials. Second, a new concept of limiting strength is proposed. Then, a systematic concept of ductile fracture prevention is proposed, by reasonably applying loading type-depending limiting strengths.
一般社団法人日本機械学会の論文
2007-10-24